Live vs. Local environment - Newtonsoft.Json referrence

In the live environment I'm getting this error. but on the local version it works.

"Could not load file or assembly 'Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)"

I have looked throug the web.config file, and I'm reference to the right version and checked that Newtonsoft.Json.dll are the right version. (6.0.5.17707)

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